221301213011 has 4 divisors (see below), whose sum is σ = 221314997592. Its totient is φ = 221287428432.

The previous prime is 221301212969. The next prime is 221301213151. The reversal of 221301213011 is 110312103122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221301213011 - 2¹⁰ = 221301211987 is a prime.

It is a super-2 number, since 2×221301213011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221301233011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6868181 + ... + 6900326.

It is an arithmetic number, because the mean of its divisors is an integer number (55328749398).

Almost surely, 2^221301213011 is an apocalyptic number.

221301213011 is a deficient number, since it is larger than the sum of its proper divisors (13784581).

221301213011 is a wasteful number, since it uses less digits than its factorization.

221301213011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13784580.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 221301213011 its reverse (110312103122), we get a palindrome (331613316133).

The spelling of 221301213011 in words is "two hundred twenty-one billion, three hundred one million, two hundred thirteen thousand, eleven".